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1. WO2020118129 - ABSORBEUR DE VIBRATIONS ACCORDÉ ADAPTATIF

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

What is claimed is:

1. A method for attenuating vibration, the method comprising:

detecting a vibration of a structure;

identifying a target position for a mass on a beam based on the detected vibration;

generating a drive signal based on the identified target position, wherein the drive signal is effective to control an actuator to adjust the position of the mass on the beam; and

controlling the actuator, based on the drive signal, to adjust the position of the mass from a current position on the beam to the target position on the beam to attenuate the vibration.

2. The method of claim 1, further comprising controlling a motor of the actuator to drive the mass along the beam.

3. The method of claim 1, wherein identifying the target position for the mass comprises identifying a mapping between the target position versus a measured frequency of the vibration.

4. The method of claim 3, wherein the mapping is among a set of mappings between one or more different positions of the mass on the beam and one or more vibration frequencies.

5. The method of claim 1, further comprising adjusting the position of the mass to a predefined default position in response to detecting one of:

an amplitude of the vibration of the structure being outside of a range of threshold amplitudes; and

a frequency of the vibration of the structure being outside of a defined frequency range.

6. The method of claim 1, further comprising:

identifying an absence of a defined mapping between a position of the mass on the beam and a measured frequency of the detected vibration; and

in response to the identification of the absence of the defined mapping, controlling the actuator to drive the mass from the current position along the beam to identify a desired position of the mass on the beam.

7. A tuned vibration absorber comprising:

a beam, wherein a fixed end of the beam is attached to a fixed point of the tuned vibration absorber, such that the beam is operable to oscillate about the fixed point;

a mass disposed on the beam;

an actuator configured to adjust a position of the mass on the beam;

a motor controller configured to control the actuator;

a sensor configured to:

detect a vibration of the structure;

generate sensor data associated with the vibration;

send the sensor data to a processor; and

the motor controller is configured to:

receive control data from the processor, wherein the control data is based on the sensor data, and the control data indicates a target position of the mass on the beam; generate a drive signal based on the received control data; and

control the actuator, based on the drive signal, to adjust the position of the mass from a current position on the beam to the target position on the beam, wherein the mass being located at the target position on the beam is effective to attenuate the vibration.

8. The tuned vibration absorber of claim 7, wherein the motor controller is further configured to control a motor of the actuator to drive the mass along the beam.

9. The tuned vibration absorber of claim 7, wherein the beam is a cantilever beam.

10. The tuned vibration absorber of claim 7, wherein the actuator is disposed at a free end of the beam.

11. The tuned vibration absorber of claim 7, wherein the actuator is disposed at the fixed end of the beam.

12. The tuned vibration absorber of claim 7, further comprising one or more damping components configured to restrict the oscillation of the beam within a range of rotation angles.

13. The tuned vibration absorber of claim 7, wherein the fixed point is a pivot, such that the beam is operable to rotate about the pivot.

14. A system effective to attenuate vibrations, the system comprises:

a tuned vibration absorber comprising:

a beam, wherein a fixed end of the beam is attached to a fixed point of the tuned vibration absorber, such that the beam is operable to oscillate about the fixed point; a mass disposed on the beam;

an actuator configured to adjust a position of the mass on the beam; a motor controller configured to control the actuator;

a sensor configured to detect a vibration of the structure;

a memory;

a processor configured to be in communication with the tuned vibration absorber and the memory;

, the sensor is further configured to:

generate sensor data associated with the vibration;

send the sensor data to the processor;

the processor is configured to:

identify a target position of the mass on the beam based on the sensor data;

generate control data that indicates the identified target position; send the control data to the motor controller;

the motor controller is configured to:

receive the control data from the processor;

generate a drive signal based on the received control data; and

control the actuator, based on the drive signal, to adjust the position of the mass from a current position on the beam to the target position on the beam, wherein the mass being located at the target position on the beam is effective to attenuate the vibration.

15. The system of claim 14, wherein the identification of the target position is based on a mapping between the target position versus a measured frequency of the vibration, wherein the mapping is stored in the memory.

16. The system of claim 15, wherein the mapping is among a set of mappings between one or more different positions of the mass on the beam and one or more vibration frequencies, and the set of mappings is stored in the memory.

17. The system of claim 14, wherein the motor controller is further configured to control the actuator to adjust the position of the mass to a default position in response to detecting one of:

an amplitude of the vibration of the structure being outside a range of threshold amplitudes; and

a frequency of the vibration of the structure being outside of a defined frequency range.

18. The system of claim 14, further comprises one or more damping components configured to restrict the oscillation of the beam caused by the vibration within a range of rotation angles.

19. The tuned vibration absorber of claim 14, wherein the actuator is disposed at a free end of the beam.

20. The tuned vibration absorber of claim 14, wherein the actuator is disposed at the fixed end of the beam.